Process for improving material thickness distribution within a molded bottle and a bottle therefrom

A base portion of a blow-molded polyester bottle, said base portion merging with a bottle sidewall and said bottle sidewall merging with an open end, said base portion comprising:

• a chime;
• a noncircular cross-sectional shape defined through said chime and defining a major axis and a minor axis;
• a contact surface merging with said chime;
• a push-up region merging with said contact surface and located radially inward therefrom;
• and
• at least one generally straight upstanding rib within said push-up region and oriented in a direction generally parallel to and offset from said major axis, wherein said base portion has its thickest portion located within said push-up and wherein said contact surface along said minor axis has a maximum thickness which is less than about 25 percent of said thickest portion.

A base portion of a blow-molded polyester bottle, said base portion merging with a bottle sidewall and said bottle sidewall merging with an open end, said base portion comprising:

• a chime;
• a noncircular cross-sectional shape defined through said chime and defining a major axis and a minor axis;
• a contact surface merging with said chime;
• a push-up region merging with said contact surface and located radially inward therefrom;
• and
• at least one generally straight upstanding rib within said push-up region and oriented in a direction generally parallel to and offset from said major axis, wherein said base portion has its thickest portion located within said push-up and wherein said contact surface along said minor axis has a maximum thickness which is less than about 40 percent of said thickest portion.

A base portion of a blow-molded polyester bottle, said base portion merging with a bottle sidewall and said bottle sidewall merging with an open end, said base portion comprising:

• a chime;
• a noncircular cross-sectional shape defined through said chime and defining a major axis and a minor axis;
• a contact surface merging with said chime;
• a push-up region merging with said contact surface and located radially inward therefrom;
• and
• at least one generally straight upstanding rib within said push-up region and oriented in a direction generally parallel to and offset from said major axis, wherein said base portion includes a boundary located within said push-up, said boundary defined by a wall thickness being no more than about 40 percent of the thickness of a thickest portion of said base portion.

A base portion of a blow-molded polyester bottle, said base portion merging with a bottle sidewall and said bottle sidewall merging with an open end, said base portion comprising:

• a chime;
• a noncircular cross-sectional shape defined through said chime and defining a major axis and a minor axis;
• a contact surface merging with said chime;
• a push-up region merging with said contact surface and located radially inward therefrom;
• and
• at least one generally straight upstanding rib within said push-up region and oriented in a direction generally parallel to and offset from said major axis, wherein said cross-sectional shape includes a convex front portion and a concave back portion connected by curved end portions.